| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | FLOCK 4P 8 |
| Spacetrack catalog number | 16611 | 44815 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 26 11:47 | 2021 Jan 26 12:28 |
| Time of closest approach (UTC) | 2020 Dec 06 23:10:19.286 |
| Minimum distance | 2.305 km |
| Height difference | -1.388 km |
| Relative speed | 15.201 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 69.6°S, 1.5°W |
| Height | 530 km |
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